| 11. | However, secondary data can present problems, too.
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| 12. | If secondary data doesn t solve the problem then original data ( primary data ) is sought.
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| 13. | Care should be taken to distinguish secondary research from primary research that uses raw secondary data sources.
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| 14. | It is also involved in the collection of primary data and the compilation and processing of secondary data.
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| 15. | Care must then be taken to ensure that the secondary data source properly reflects regional or national conditions.
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| 16. | However, secondary data analysis can be less useful in marketing research, as data may be outdated or inaccurate.
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| 17. | Secondary data is data that already exists, such as census data, which can be re-used for the research.
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| 18. | The Internet is all secondary data,
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| 19. | The electrical signaling standards intended for use with RS-449 are DE-9 for the primary and secondary data circuits.
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| 20. | Hedonic price regression models are estimated using secondary data on prices and attributes of different product or service alternatives.
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